option A :- (3a + 12 ) / a
Since we have a rectangle triangle, then we can find the other side of the triangle using the Pythagorean theorem.
We have then:

Then the surface area is given by the sum of the areas.
Triangle of the base and the top:

Rectangle 1:

Rectangle 2:

Rectangle 3:

Finally, the surface area is:

Substituting values:
Answer:
The surface area of a right triangle prism is:
B. 132
Hope this helps :) with your problem
Answer:
A "underfined term" is used when a mathematical result has no meaning.
Answer: No. To the contrary, "12,000,000" is the "standard form" of
"1.2 times 10 to the POSITIVE 7 power.
That is; "12,000,000 = 1.2 * 10⁷ " .
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